void setup() {
    // put your setup code here, to run once:
    pinMode(1,OUTPUT);
    pinMode(2,OUTPUT);
    pinMode(3,OUTPUT);
    pinMode(4,OUTPUT);
    pinMode(5,OUTPUT);
    pinMode(6,OUTPUT);
    pinMode(7,OUTPUT);
    pinMode(8,OUTPUT);
    pinMode(9,OUTPUT);
    pinMode(10,OUTPUT);
    pinMode(11,OUTPUT);
    pinMode(12,OUTPUT);
    pinMode(13,OUTPUT);
    pinMode(14,OUTPUT);
    pinMode(15,OUTPUT);
    pinMode(16,OUTPUT);
    pinMode(17,OUTPUT);
    pinMode(18,OUTPUT);
    pinMode(19,OUTPUT);
    pinMode(20,OUTPUT);
    pinMode(21,OUTPUT);
    pinMode(22,OUTPUT);
    pinMode(23,OUTPUT);
    pinMode(24,OUTPUT);
    pinMode(25,OUTPUT);
    pinMode(26,OUTPUT);
    pinMode(27,OUTPUT);
    pinMode(28,OUTPUT);
    pinMode(29,OUTPUT);
    pinMode(30,OUTPUT);
    pinMode(31,OUTPUT);
    pinMode(32,OUTPUT);
    pinMode(33,OUTPUT);
    pinMode(34,OUTPUT);
    pinMode(35,OUTPUT);
    pinMode(36,OUTPUT);
    pinMode(37,OUTPUT);
    pinMode(38,OUTPUT);
    pinMode(39,OUTPUT);
    pinMode(40,OUTPUT);
    pinMode(41,OUTPUT);
    pinMode(42,OUTPUT);
    pinMode(43,OUTPUT);
    pinMode(44,OUTPUT);
    pinMode(45,OUTPUT);
    pinMode(46,OUTPUT);
    pinMode(47,OUTPUT);
    pinMode(48,OUTPUT);
    pinMode(49,OUTPUT);
    pinMode(50,OUTPUT);
    pinMode(51,OUTPUT);
    }
    
    void loop() {
           //put your main code here. to run repeatedly:
      digitalWrite(1, HIGH);
      digitalWrite(2, HIGH);
      digitalWrite(3, HIGH);
      digitalWrite(4, HIGH);
      delay(150);
      digitalWrite(1, LOW);
      digitalWrite(2, LOW);
      digitalWrite(3, LOW);
      digitalWrite(4, LOW);
      delay(150);
     digitalWrite(5, HIGH);
     digitalWrite(6, HIGH);
     digitalWrite(7, HIGH);
     digitalWrite(8, HIGH);
     delay(150);
     digitalWrite(5, LOW);
     digitalWrite(6, LOW);
     digitalWrite(7, LOW);
     digitalWrite(8, LOW);
     delay(150);
     digitalWrite(1, HIGH);
      digitalWrite(2, HIGH);
      digitalWrite(3, HIGH);
      digitalWrite(4, HIGH);
    digitalWrite(9, HIGH);
      digitalWrite(10, HIGH);
      digitalWrite(11, HIGH);
      digitalWrite(12,HIGH);
      delay(150);
      digitalWrite(1, LOW);
      digitalWrite(2, LOW);
      digitalWrite(3, LOW);
      digitalWrite(4, LOW);
    digitalWrite(9, HIGH);
      digitalWrite(10, HIGH);
      digitalWrite(11, HIGH);
      digitalWrite(12, HIGH);
      delay(150);
      digitalWrite(5, HIGH);
     digitalWrite(6, HIGH);
     digitalWrite(7, HIGH);
     digitalWrite(8, HIGH);
     digitalWrite(13, HIGH);
     digitalWrite(14, HIGH);
     digitalWrite(15, HIGH);
     digitalWrite(16, HIGH);
     delay(150);
     digitalWrite(5, LOW);
     digitalWrite(6, LOW);
     digitalWrite(7, LOW);
     digitalWrite(8, LOW);
     digitalWrite(13, LOW);
     digitalWrite(14, LOW);
     digitalWrite(15, LOW);
     digitalWrite(16, LOW);
     delay(150);}